How to create black color in Eevee without any reflections?
To make an object that receives no shading, just plug the color directly into the Material Output with no shader in between.
As you can see from the image, the black planet is surrounded by lights and an emission object (I put planes to show that there in fact lights there). You can see with bloom on, that there will still be some color bleed-over, but there is no &quot;reflection&quot; on the black planet:

Here is the same thing without bloom (for reference):